Source

Game and Story Use

If this attempt had been successful and condoned by the British government (unlikely, with Winston Churchill in office), this might be a turning point in an Alternate History campaign.

And given the state of play in 1941, it's not all that unlikely that Britain might have sought terms … the absence of one or both of Churchill and the "Miracle of Dunkirk" might have swung it. Likely as not, Mussolini would have been the go-between for the armistice negotiations.

In a historical campaign, the PCs might be assigned to accompany Lonsdale-Bryans as bodyguards, or alternately to prevent his mission from succeeding.